Method for joining pipes



July 31,- 192-8. v I 1,678,740

- A. A. G. MAGIS mmnon FOR JOINING PIPES F312;; Jan. 23, 1924 '4sllTezztsr-jsheet 1 bf r 4. 0.5. F7615. F1627. 1% Q F161 10. v may. 3?;

4 H6111. FIGIJZ ATTORNEY.

July 31, 1928.

A. A. G. MAGIS METHOD FORv JOINING PIPES Filed Jan. 23, 1924 4Sheets-Sheet 2 Aug/5r: ABEL/N 61/574145 MJQSJNVENTOR.

July 31, 1928.

A. A. G. MAGIS METHOD FOR JOINING PIPES 4 sheet sheet 4 Filed Jan. 23,1924 ATTORNEY.

Patented July 31, 1928.

UNETED STATES PATENT FFlCE.

AUGUSTE ADELIN GUSTAVE MAGIS, (3F FRANCE, ASSIGNOR TO THE SUPER,- HEATERCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

METHOD FOR JOINING lIPES.

Application filed January 23, 1924, Serial No. 688,001, and in FranceMarch 21, 1923.

In Patent 1,169,209 of January 25th, 1916, there is described a processfor welding together two parallel tubes so that a return bend is formed.According to this process the two tubes are united by-a singleoperation, by inserting into the tubes a bifurcated plunger, the twobranches of which are connected by a web; the two tubes, having beenraised to a welding heat, were split by said web; the edgesof the splitportions were bent outward and the welding of one edge of one tube withthe edge of the other tube was accomplished by pressing between theplunger and the matrix.

To weld together the extremity of n tubes, it would be necessary toperform a or n successive operations depending upon whet-her one wantedto connect the last tube to the first or not and at times it would beimpossible to perform the last operation. In this manner there would beformed only a sort of a. crown with an open center which could be closedby any desired means.

The present invention has for its object to simplify all theseoperationsand to con nect by a single stroke as many tubes as desiredwithout its being necessary finally to close any central openings.

The process consists essentially in holding the tubes one againstanother or at. a very small distance from each other, in heating theirends to a welding heat and in inserting in a direction parallel to theiraxes a plunger provided with a plurality of branches. This plunger hasas many branches as there are tubes to be connected. The branches alongadjacent sides are of a thickness whiehbecomes progressively greateruntil they touch. They are prolonged into a single and continuoussurface, which quickly merges into a convex shape and forms a breechespiece which is thereafter closed in any convenient manner to form areturn bend for example, by the means described in Patent 1,169,209.

The successlon of operations for forging by the process of the Patent1,169,209 is the following:

(a) A splitting of the tubes along an element.

(1)) The opening outward of the parts adjacent to the slit.

(0) The pressing of these edges between the male and female pieces,resulting in a weld.

in the process forming the subject matter of the present invention,however, the succession of the operations is as follows:

(a) The material of the tubes, taken two and two, is compressed betweenthe branches of the plunger, which approach each other more and more, sothat a. welding results, since the material cannotmove longitudinally,the tubes being very close together and cold at points only slightlyremoved from the place where the plunger is workmg.

The welded portionis then split by the line along which the twobranches: of the plunger are joined, and each part slides along theplunger and unites with its corresponding surface.

It will be seen that no female dies are required to weld the tubestogether. Nevertheless in order to obtain a uniform. thickness of thepiece produced a female die may be employed toward the. open end of theresulting structure.

The following description taken in connection with the annexed drawinggiven by way of. example will make it possible to understand the mannerin which the invention is put into practice:

Figs. 1, 2 and 3 show in end view, side elevation (partly in section)and in plan view a-plunger for connecting four tubes.-

Figs. 4, 5, 6 and '7v are sections of the plunger at lines TT, VV, YYand ZZ of the plunger shown in Fig. 2;

Fig. 8 is anend view of the lower half of the female die which can beused if desired in combination with the plunger.

Fig. 9 is a longitudinal section on line XX-XX of the female die shownin Fig. 8;

Fig. 10 is a. plan view of Fig. 9.

Figs. 11 and 12 are cross sections of the female die on lines U-U, X- -Xof Fig. 9.

Fig. 13 is a section of the four tubes after the welding has beencompleted.

Figs. 14, 15, 16, 17 and 18 are sections of T'T, V-V, Y-Y, ZZ, W-WV ofFig. 13.

Figs. 19 and 20 show in side view and in end View the four connectedtubes.

Figs. 21. to 38 are corresponding views relating to the connection bywelding of four external tubes to an inner tube of larger diameter.

Figs. 21, 22 and 23 are views of the plunger.

Figs. 24., 25, 26 and 27 are sections on t t, 12-0, yy and ze of Fig.22.

Figs. 28, 29 and 30 show the female die.

Figs. 31, 32 and 32 are sections on ss, u-u, wx of Fig. 29.

Fig. 33 shows a section of the tubular bundle after thewelding iscompleted.

Figs. 34:, 35, 36, 37, 38, 38 and 38 are sections of Fig. 33 on linestt, o-' v', y z 22, aa'm and w-w.

The tubes at, which are to be connected by the present process areheated at their common extremities to a welding heat and are held by anyconvenient device at a. certain distance from their extremities at apoint where they are cold and therefore absolutely rigid.

The plunger with its plurality of branches 6 is then inserted into allthe tubes and completely forced in, the bundle of pipes being eitherplaced in a female die 0 or not. By forcing the plunger inward therewill result, as an inspection of the drawing will show, first a pressingtogether and then a welding of the contiguous tubes two by two,thereupon a slitting of the tubes so welded and a lateral spreading ofthe edges which slip along the plunger in such a Way as finally to forma hollow cylinder or piece a, following the full form of the plunger.

The plunger is then withdrawn and the piece is closed by any desiredmeans.

In welding four tubes according to-Figs.

.1 to 20, it should be noted that the plunger 6 has an axial opening Z)into which there is forced all that part of the metal which, as will beseen in Fig. 16, is separated in the central portion by the branches ofthe plunger. After the welding is completed, the tubular group will havewithin the cylindrical part a a solid cylinder of metal a Figs. 1 9 and20, which if desired may be removed.

It will be seen that modifications can be introduced to this process orapparatus which has just been described without lessening the spirit ofthe present invention.

What I claim is:

1. The method of making a structure of the kind referred to comprisingthe steps of holding a plurality of pipes in parallel relation in therelative position they are to occupy in the finished structure, heatingthe portions of the pipes to be joined to a suitable temperature,pressing portions of the wall of each pipe against the adjacent portionsof two neighboring pipes thereby welding the walls together, andthereafter splitting the welded walls so that the interior of each pipeopens into the interior of the adjacent pipes.

2. The method of making a structure of the kind referred to con'iprisingthe steps of holding a plurality of pipes in parallel relation in therelative position they are to occupy in the finished structure heatingthe portions of the pipes to be joined to a suitable temperature,pressing the wall of one pipe against the adjacent wall of a neighboringpipe thereby welding the walls together for a distance, and thereaftersplit-- ting the welded walls so that the interior of the first pipeopens into the interior of the other pipe.

3. The method of making a structure of the kind referred to comprisingthe steps of holding a plurality of pipes in parallel relation in therelative position theyare to occupy in the finished structure, heatingthe portions of the pipes to be joined to a suitable temperature,pressing portions of the wall of one pipe against the adjacent portionsof .two neighboring pipes thereby welding the walls together, andthereafter splitting the welded walls so that the in terior of saidfirst pipe opens into the interior of the other two pipes.

4. The method of making a structure of the kind referred to comprisingthe steps of holding plurality of pipes in parallel relation in therelative position they are to occupy in the finished structure, heatingthe portions of the pipes to be joined to a suitable temperature,pressing portions of the wall of one pipe against the adjacent portionsof two neighboring pipes by means of a tool inserted into the pipesthereby welding the walls together, and thereafter splitting the weldedWalls so that the interior of said first pipe opens into the interior ofthe other two pipes.

In testimony whereof I have signed this specification.

'AUGUSTE ADELIN GUSTAVE MAGiS.

